Sr. Full Stack Engineer

Location: Hybrid, 3 days/week in San Francisco, New York City, or Vancouver (relocation support available) We recommend you apply direct with the employer, you can review full details on the role and company info before submitting your application. Apply Here About the Role Were looking for a Senior Full-Stack Engineer to design and deliver high-impact product features and backend services that turn complex GTM data into actionable insights. You'll build intuitive user interfaces in React/TypeScript and robust APIs with Python FastAPI/GraphQL, powering seamless agent workflows. This is a hands-on role where you'll collaborate closely with Product and GTM teams, owning projects from concept to production. What You'll Do Build and ship web applications with React/TypeScript, focusing on performance, UX, accessibility, and instrumentation. Design and implement APIs, services, and data models in Python (FastAPI/GraphQL). Contribute to orchestration, retrieval, and evaluation frameworks to improve agent workflows. Ensure production excellence by adding observability, testing, runbooks, and performance optimizations. Deliver integrations with CRM and sales tools to streamline user workflows. Lead technical design, write RFCs, review code, and mentor engineers while improving standards and tooling. What Were Looking For 4+ years of full-stack development experience with measurable impact on user-facing products. Strong expertise in React/TypeScript and Python (FastAPI/GraphQL). Experience with AWS, PostgreSQL/DynamoDB, Kubernetes, Pulumi, and event-driven systems. Proven ability to transform multi-source data into reliable, production-ready models. Strong instincts around reliability, privacy, scalability, and cost optimization. Excellent communication skills for technical trade-offs and cross-functional collaboration. Bonus Points For Experience with agent orchestration, retrieval systems, or graph-shaped data models. Background in eval frameworks or distributed systems. Previous work in AI, data infrastructure, or GTM tooling. We recommend you apply direct with the employer, you can review full details on the role and company info before submitting your application. Apply Here  https://theseeklab.com/direct-apply/313c6546-9a76-4577-945f-e196cbf09e45